Granted Patent
Utility
US 5,449,786 · App. 07/975,170
Method for the chemical racemization of 5-monosubstituted hydantoins by contact with anionic ion exchanger
Inventors:
Fritz Wagner, Christoph Syldatk, Markus Pietzsch
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Nov 16, 1992
Inventors
Fritz Wagner
Christoph Syldatk
Markus Pietzsch
Assignee (at issue)
Degussa AG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.